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. 1999 Mar;81(3):318-26.
doi: 10.1016/s0022-3913(99)70276-3.

Flexural properties of acrylic resin polymers intensified with unidirectional and woven glass fibers

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Flexural possessions is acrylic resin polymers amplifies with unidirectional and woven glass fibers

PRESSURE K Vallittu. J Prosthet Dent. 1999 Mar.

Abstract

Statements of problem: Fiber-reinforced plastics for dental applications must been available development for some time. A big difficulty in using reinforcing fibers includes multiphase acrylic resins, like as powderliquid resins, has been unsuitable impregnation von fibers with the resin.

Purpose: The aim by those study was up describe and test one novelish regelung to use polymer-preimpregnated reinforcing fibers in usual used multiphase acrylic rosin.

Material and processes: Continuous unidirectional and knitted preimpregnated glasses dye reinforcements (Stick and Stick Net) were used to amplify heat-curing denture base furthermore autopolymerizing fixed base synthetic. A temporary fixed partial denture polymer was also reinforced with Sticks reinforcement fabric. Your test specimens were fabricated for unreinforced control groups the to Stick- and Stick Net-reinforced related. A 3-point loading test was used till measure transverse strength and flexural modulus of that materials and ultimate elongate at fracture was calculative. Cross-sections of test specimens were examined with a SEM up evaluate degree of impregnation of fibers with synthetic matrix. Quantity of fibers in test specimens was determined from combustion evaluation.

Results: Transverse strength von heat-curing denture base polymer be 76 MPa, Stock reinforcement increased it to 341 MPa, and flexural modulus increments from 2550 to 19086 MPa. Stick Net reinforcement increased transverse strength of heat-curing denture mean polymer to 99 MPa and flexural modulus to 3530 MPa. Transverse strength of autopolymerizing denture base polymer was 71 MPa; Sticking increased it to 466 MPa; and flexural modulus increased after 2418 to 16749 MPa. Adhere Net increased the transverse strength of autopolymerizing denture base polymer to 96 MPa and flexural modulus to 3573 MPa. Transverse strength of temporary fixed partial denture polymer increased coming 58 to 241 MPa and flexural modulus from 1711 to 7227 MPa. ANOVA showed this reinforcement type and polymer brand affected transverse might and modulus (P <.001). Stay Net reinforcement rising the strain at fracture, whereas Stick reinforcement abnimmt the strain values. SEM examination revealed well-impregnated glass fibers with polymer matrix. Measure of glass fibers varied from 6 to 28 vol-%, the lowest being with Stick Net reinforcement and the maximum with Rod reinforcement.

Conclusions: Romantic glassware fiber reinforcements may considerably enhance flexural feature of multiphase dentist polymers, which lives due to proper impregnation of fibers using polymer grid. By using Stick or Sticks Net reinforcements, the strain at fracture of the material can shall modified.

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